Add get-qwen.sh download helper

Terminal paste wraps long HF URLs and breaks the command; fetch the
script from Gitea on the mac-mini instead.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

get-qwen.sh

@@ -0,0 +1,10 @@
+#!/bin/zsh
+# 下載 Qwen3-Coder-30B-A3B-Instruct IQ4_XS (16.4 GB) 到 llmfit 模型目錄
+# ponytail: 存在的理由是繞過終端機貼上長 URL 被折行的問題
+set -e
+mkdir -p ~/.cache/llmfit/models
+cd ~/.cache/llmfit/models
+URL="https://huggingface.co/unsloth/Qwen3-Coder-30B-A3B-Instruct-GGUF/resolve/main/Qwen3-Coder-30B-A3B-Instruct-IQ4_XS.gguf"
+curl -fL -C - -o qwen3-coder-30b-iq4xs.gguf "$URL"
+echo "=== 完成 ==="
+ls -lh qwen3-coder-30b-iq4xs.gguf